Lenslet based snapshot hyperspectral camera

摘要

A hyperspectral camera system includes an input optical assembly, a lenslet array, a dispersion element, and an image sensor. The input optical assembly magnifies an image of a sample onto an image plane. The lenslet array is positioned approximately at the image plane and includes a 2D array of microlenses that concentrate the image into an array of image portions. Each of the image portions has a smaller area than a corresponding one of the microlenses and the image portions are at least partially separated from each other by interstitial regions. The dispersion element is disposed in the optical path of the image to spatially disperse spectral components in each of the image portions to generate spectrum stripes that spatially spread different spectral components of the image sourced from a single sample location within the sample. The image sensor captures a snapshot image of the spectrum stripes.